I use Ubuntu 12.04 on a two screen setup. Multiscreen on 12.04 has generally become much better, but there is one thing that really gets on my nerves: there's a mouse magnet of sorts on the middle edge (between the two screens). It's undoubtedly there to make it easier to interact with the launcher on the right screen. But I have enough trust in my mousing skills, the magnet is more annoying than helpful in my case. Can I disable it somehow?

12 Answers
12

You may still get the behaviour if you have a launcher on the right monitor, so use the "Launcher Placement" option to select having your launcher on only the left screen. The stickyness between the screens is required for it to be easy to retrieve the launcher there.

You might need to log out and back in (or restart) for the changes to take effect.

I had a similar effect, because the monitors had a space between them (in the dialog above). After dragging them together, the cursor appeared right away afer leaving the other screen.
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iGELApr 30 '13 at 21:47

5

OMG! I can't believe I didn't see this. My life became so much easier.
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Eduard LucaJul 3 '13 at 11:24

It's surprising that one has to restart the login session to get this to work, though: after all, what does that mean the Apply button is actually for; and what good is the "Keep This Configuration" dialogue box for, when you won't even have the sum total of the configuration until you log in again?
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J-PNov 11 '13 at 9:06

1

FWIW, I didn't have to restart in 13.10. It took effect as soon as I hit 'Apply'.
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GeobitsDec 11 '13 at 0:56

Thank you. I'm glad you found it useful. There is often more than one way to answer a question and I think the accepted answer is easier and more accessible to more people, so I'm very comfortable being in the second place :)
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Jo-Erlend SchinstadJun 20 '14 at 23:04

I personally thought it could be a wrong design in an extended desktop where in the middle of the desktop, a launcher is present. Yet, notice that the launcher has new settings :

The reveal sensitivity allows you to adjust how much the launcher is sensitive to your mouse crossing. The higher, the more you have to push the mouse against the launcher to reveal it. While auto-hide is activated, and about 27 % of reveal sensitivity, you can surf your mouse from the left external monitor to the right one or the opposite, easily without accidently revealing the launcher. Check the poll, if you want to vote for this option.

Or from GUI run Ubuntu Software Center, search for compizconfig-settings-manager, and install. Then click on Ubuntu Search, search for compizconfig-settings-manager and run it.
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robocatOct 19 '14 at 21:44

This seems to give the perfect balance for me. No lag when dragging windows between screen. Launcher is fairly easy to access on both monitors, No mis-reveals when going for the back button in the browser...

Also if you want to leave it the way it is I have found that moving the mouse VERY quickly past the middle will let you pass right through it without even the slightest bit of hang time. I still changed it mainly because moving the mouse that fast was a bit annoying. Maybe someone will find it useful though.

The launcher capture mouse option in ccsm and the settings>displays "Sticky edges" options didn't stop the edge capture from right to left for me. The only thing that worked was setting the "Launcher Edge Stop Velocity" to 1 and having , that solved the issue for me. No other modifications required.

I have no interest in Unity launcher menu on my secondary right hand screen, and the hastle this caused in day to day use was an unwelcome pain. I didn't realise the ccsm Unity experimental settings were there so I had to live with it for about 4 months. God that was annoying.

I had the same problem (right-to-left remained sticky). I solved it in Displays by setting Launcher Placement to All Displays, clicking Apply and Keep This Configuration, then setting it back to only the left display. Setting Edge Stop Velocity to 1 meant I couldn't open the Launcher (on left screen) with the mouse, and I still had a (slightly) sticky edge.
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drevickoAug 9 '13 at 0:49

@drevicko - you should add this as an answer, that's the only thing that worked for me
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geoffreyMar 24 '14 at 7:43

The problem only happens when you have the launcher placed on "All Displays". I had already changed "Settings > Displays > Sticky edge > OFF", but there was no improvement. So I changed "Settings > Displays > Launcher Placement" to my first monitor only (removing "All Displays"), and the problem disappeared.